#define _CRT_SECURE_NO_WARNINGS 1

#include <iostream>
#include <cstdio>

using namespace std;

int main()
{
    /*printf("%d\n", stdin);
    printf("%d\n", stdout);
    printf("%d\n", stderr);*/
    FILE* f = fopen("log.txt", "w");
    fwrite("hello", 1, 5, f);
    int i = 0;

    return 0;
}